/*  
 * Copyright 2008 CoreMedia AG, Hamburg
 *
 * Licensed under the Apache License, Version 2.0 (the License); 
 * you may not use this file except in compliance with the License. 
 * You may obtain a copy of the License at 
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0 
 * 
 * Unless required by applicable law or agreed to in writing, software 
 * distributed under the License is distributed on an AS IS BASIS, 
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
 * See the License for the specific language governing permissions and 
 * limitations under the License. 
 */

package com.coremedia.iso.boxes;

import com.coremedia.iso.IsoTypeReader;
import com.coremedia.iso.IsoTypeWriter;
import com.googlecode.mp4parser.AbstractFullBox;
import com.googlecode.mp4parser.authoring.DateHelper;

import java.nio.ByteBuffer;
import java.util.Date;

/**
 * This box defines overall information which is media-independent, and relevant to the entire
 * presentation considered as a whole.
 */
public class MediaHeaderBox extends AbstractFullBox {
  public static final String TYPE = "mdhd";


  private Date creationTime;
  private Date modificationTime;
  private long timescale;
  private long duration;
  private String language;

  public MediaHeaderBox() {
    super(TYPE);
  }

  public Date getCreationTime() {
    return creationTime;
  }

  public Date getModificationTime() {
    return modificationTime;
  }

  public long getTimescale() {
    return timescale;
  }

  public long getDuration() {
    return duration;
  }

  public String getLanguage() {
    return language;
  }

  protected long getContentSize() {
    long contentSize = 4;
    if (getVersion() == 1) {
      contentSize += 8 + 8 + 4 + 8;
    } else {
      contentSize += 4 + 4 + 4 + 4;
    }
    contentSize += 2;
    contentSize += 2;
    return contentSize;

  }

  public void setCreationTime(Date creationTime) {
    this.creationTime = creationTime;
  }

  public void setModificationTime(Date modificationTime) {
    this.modificationTime = modificationTime;
  }

  public void setTimescale(long timescale) {
    this.timescale = timescale;
  }

  public void setDuration(long duration) {
    this.duration = duration;
  }

  public void setLanguage(String language) {
    this.language = language;
  }

  @Override
  public void _parseDetails(ByteBuffer content) {
    parseVersionAndFlags(content);
    if (getVersion() == 1) {
      creationTime = DateHelper.convert(IsoTypeReader.readUInt64(content));
      modificationTime = DateHelper.convert(IsoTypeReader.readUInt64(content));
      timescale = IsoTypeReader.readUInt32(content);
      duration = IsoTypeReader.readUInt64(content);
    } else {
      creationTime = DateHelper.convert(IsoTypeReader.readUInt32(content));
      modificationTime = DateHelper.convert(IsoTypeReader.readUInt32(content));
      timescale = IsoTypeReader.readUInt32(content);
      duration = IsoTypeReader.readUInt32(content);
    }
    language = IsoTypeReader.readIso639(content);
    IsoTypeReader.readUInt16(content);
  }


  public String toString() {
    StringBuilder result = new StringBuilder();
    result.append("MediaHeaderBox[");
    result.append("creationTime=").append(getCreationTime());
    result.append(";");
    result.append("modificationTime=").append(getModificationTime());
    result.append(";");
    result.append("timescale=").append(getTimescale());
    result.append(";");
    result.append("duration=").append(getDuration());
    result.append(";");
    result.append("language=").append(getLanguage());
    result.append("]");
    return result.toString();
  }

  protected void getContent(ByteBuffer byteBuffer) {
    writeVersionAndFlags(byteBuffer);
    if (getVersion() == 1) {
      IsoTypeWriter.writeUInt64(byteBuffer, DateHelper.convert(creationTime));
      IsoTypeWriter.writeUInt64(byteBuffer, DateHelper.convert(modificationTime));
      IsoTypeWriter.writeUInt32(byteBuffer, timescale);
      IsoTypeWriter.writeUInt64(byteBuffer, duration);
    } else {
      IsoTypeWriter.writeUInt32(byteBuffer, DateHelper.convert(creationTime));
      IsoTypeWriter.writeUInt32(byteBuffer, DateHelper.convert(modificationTime));
      IsoTypeWriter.writeUInt32(byteBuffer, timescale);
      IsoTypeWriter.writeUInt32(byteBuffer, duration);
    }
    IsoTypeWriter.writeIso639(byteBuffer, language);
    IsoTypeWriter.writeUInt16(byteBuffer, 0);
  }
}
